wrmsr(1)

wrmsr1

Tool for writing cpu machine specific registers (msr)

Usage

wrmsr [options] regno value

Overview

wrmsr is a tool used for writing values to a CPU's machine specific registers (MSR).
Note: if you're running a Debian kernel, be sure that the msr.ko kernel module is loaded. 'modprobe msr' should do the trick. Otherwise, you'll get an error about wrmsr not being able to open files in /dev/cpu/...

Options

--help, -h

Print a list of available options

--version, -V

Print current version

--all, -a

All processors

--processor <#>, -p

Select processor number (default: 0)

Releases

9 releases since Debian 5.0 (Lenny); the text changed 1 time.

  1. 5.0–7
  2. 8–13

--all since Debian 8 (Jessie); -a since Debian 8 (Jessie).

Author

wrmsr was written by Transmeta Corporation

This man page was contributed by Andres Salomon <[email protected]> for the Debian GNU/Linux system (but may be used by others).

From msr-tools 1.3+git20220805.7d78c80-1 in Debian 13 (Trixie). Parsed by carta from the page's man source.